Name three bright ring features, and explain why they are so bright.

The F Ring, the Cassini Division, and the C Ring are bright ring features. They are bright due to the low concentration of materials within them, which allows sunlight to shine through.

The three bright ring features are as follows –

a)F Ring

b)The Cassini Division

c)The C Ring

These rings shine so much because the concentration of material is low in these rings due to which the light of sun shines through them while passing through them. The F ring is the outermost ring while the C ring is the innermost ring.  

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.